Department of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway.
School of Sport Sciences, UiT The Arctic University of Norway, 9509 Alta, Tromsø, Norway.
BMC Public Health. 2020 Jul 17;20(1):1127. doi: 10.1186/s12889-020-09171-w.
Previous studies show large variations in physical activity (PA) levels among adolescents. However, the number of studies is limited and even fewer studies have assessed PA in adolescents by accelerometer devices. This study aimed to describe accelerometer-measured PA levels in adolescents in a population-based cohort in Northern Norway.
In 611 students aged 16-17 years attending the Fit Futures Study, PA was measured by Actigraph GT3X for seven consecutive days. PA was expressed as total PA volume (counts per minute, CPM), time spent in intensity zones, steps per day, and fulfilment of WHO recommendation (i.e. accumulation of 60 min or more of at least moderate intensity PA per day). Potential correlates of PA such as sex, socioeconomic status, study program, self-perceived health, and PA variations by weekday versus weekend were also examined.
16% of the girls and 25% of the boys fulfilled current WHO-recommendations. Total PA volume (CPM) was higher in boys than in girls (353 (SD 130) versus 326 (SD 114) CPM, p < 0.05). PA levels differed with study program and increased with better self-perceived health, but were not associated with socioeconomic status. Both boys and girls were more active on weekdays than weekends (altogether; 350 (SD 124) versus 299 (SD 178) CPM, p < 0.05).
In this cohort of adolescents, less than 25% of 16-17-year-old boys and girls fulfilled the WHO recommendations. The levels of physical activity in 16-17-year-old adolescents are similar to previous data reported in adults.
先前的研究表明，青少年的体力活动（PA）水平存在很大差异。然而，此类研究的数量有限，通过加速度计设备评估青少年 PA 的研究则更少。本研究旨在描述挪威北部一项基于人群的队列中青少年的加速度计测量 PA 水平。
在参加 Fit Futures 研究的 611 名 16-17 岁的学生中，使用 Actigraph GT3X 连续 7 天测量 PA。PA 以总 PA 量（每分钟计数，CPM）、在各强度区间所花费的时间、每天的步数以及达到世卫组织建议（即每天至少积累 60 分钟或更多至少中等强度的 PA）表示。还检查了 PA 的潜在相关因素，如性别、社会经济地位、学习计划、自我感知健康以及工作日与周末的 PA 变化。
16%的女孩和 25%的男孩符合当前的世卫组织建议。男孩的总 PA 量（CPM）高于女孩（353（SD 130）与 326（SD 114）CPM，p<0.05）。PA 水平因学习计划而异，且随着自我感知健康状况的改善而增加，但与社会经济地位无关。男孩和女孩在工作日比周末更活跃（总计；350（SD 124）与 299（SD 178）CPM，p<0.05）。
在本队列的青少年中，不足 25%的 16-17 岁男孩和女孩符合世卫组织的建议。16-17 岁青少年的体力活动水平与以前成年人报告的数据相似。
